value initialization and array data member

[Gabriel Dos Reis]

Hi Jason,

I'm looking into std::bitset with respect to constexpr issue.
My understanding has always been that one can use the
syntax `member()' to value-initialize an array data member
`member'.  However, std/biset uses the notation
`member({ })'.  Is that required?  Especially for a mem-initializer
in a constexpr constructor definition?

-- Gaby